1. EASY

Is 12 even or odd?

 
2. EASY

Is the sum of 3 and 8 even or odd?

 
3. EASY

Is 55 even or odd?

 
4. MEDIUM

Which number is not odd?

  1. 8
  2. 23
  3. 19
  4. 37252345
  5. 12345
 
5. MEDIUM

If we add 1 to an even number, is the sum even or odd?

 
6. MEDIUM

If we add 1 to an odd number, is the sum even or odd?

 
7. MEDIUM

Which number is not even?

  1. 135
  2. 12
  3. 94
  4. 50
  5. 0
 
8. HARD

5 is odd and 9 is odd. Will their sum be even or odd?

 
9. HARD

6 is even and 8 is even. Will their sum be even or odd?

 
10. HARD

7 is odd and 4 is even. Will their sum be even or odd?